Fix Python 2 tests.

test/test_parser/test_parser.py

@@ -185,7 +185,7 @@ def test_param_splitting():
             # We don't want b and c to be a part of the param enumeration. Just
             # ignore them, because it's not what we want to support in the
             # future.
-            assert [str(param.name) for param in m.subscopes[0].params] == result
+            assert [param.name.value for param in m.subscopes[0].params] == result
 
     check('def x(a, (b, c)):\n pass', ['a'])
     check('def x((b, c)):\n pass', [])